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-rw-r--r--build/util.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/build/util.py b/build/util.py
index 328611d5ca..d47ae31baf 100644
--- a/build/util.py
+++ b/build/util.py
@@ -157,7 +157,7 @@ def write_build_header(path):
branch_name = get_branch_name()
modified = len(get_modified()) > 0
# Do not emit BUILD_BRANCH on release branches.
- if not branch_name.startswith('release'):
+ if branch_name and not branch_name.startswith('release'):
f.write('#define BUILD_BRANCH "%s"\n' % branch_name)
f.write('#define BUILD_REV "%s%s"\n' % (get_revision(),
'+' if modified else ''))